Gas fueled combustion chamber and air inlet baffle



J 1953 c. w. SIEVERT GAS FUELED COMBUSTION CHAMBER AND AIR INLET BAFFLE I Filed May 6, 1948 III I INVENTOR.

' Patented June 16, 1953 UNITED, STATES gP A TENT I OFFICE GAS FUELED COMBUSTION CHAMBER AN 7 AIR INLET BAFFLE I Charles Sievert, Los Angeles, Calif., assignor to FrederickW. Sievert, Los Angeles; Calif.

Application May 6, 1948, Serial No. 25,428

, 2 Claims.

This invention relates to a flash type gas burner wherein firing occurs simultaneously with mixing. I An object of this invention is to improve upon prior burner structures in regard to capacity'for more quickly producingtthe amountof heat required for a given purpose, for example, to heat a? steam boiler or other heater sufficiently to cause it to. produce the desired horsepower.

Another object. of the invention is to provide burner means particularly adapted for use with heaters having downwardly opening combustion chambers.

A further object of the invention is to provide a burner having .bafiie means constructed to eliminate or decrease objectionable panting.

Still anotherv object ofthe invention is to provide a burner having annular bafiie means which effects highly efiicient operation. Other objects, advantages and features of in vention will hereinafter appear. v

Referring to the accompanying drawing, which illustrates a preferred embodiment of the inven tion, I

Fig. 1 is a horizontal section on line |-Ii of Fi 2.

Fig. 2 is a vertical midsection on line 2--2 of Figjl, except that some parts through which the plane of section passes are shown in elevation.

' Fig. 3 is a partly sectional and partly elevational view of the burner head per se, the plane of the sectioned portion of the view being indicated by line 33 on Fig. 2.

Referring in detail to the drawing, the burner head-5 is shown mounted in a concentric relation to the circular skirt 6 of a boiler structure I, said burner head being shown in substantially the same horizontal plane as the lower end of said skirt. Said boiler structure is shown supported by posts 8, the upper end portions of said posts being externally secured to said skirt by welds 9.

In order to provide around said burner head the desired air draft an annular member ID, the diameter of which extends horizontally, is supported for vertical adjustment together with an elongated base plate I I shown integral therewith and supplemented by twin segmental plates I2 one attached to each side of said base plate so as to make up a circular, horizontal plate structure surrounding the lower end of said annular member ID. Said segmental plates I2 are shown detachably connected to said base plate II by means of short bolts Ilb which pass through apertured ear plates Ilc cast integral with the inner edge portionsqofthe upper face of said segmental plates I2, the lower ends of said bolts having nuts. Ild screwed onto them.

The aforesaid circular plate structure is supported for vertical adjustment upon upstanding bolts IN the upper end portions of which pass through apertures therein, said bolts carrying upper nuts I3 whichcooperate. with lower lock nuts I4 to adjust the base plate structure together with said annular member Is; at the desired height in relation to the lower end portion of the boiler skirt 6. This adjustment only slightly affects the upfiow of primary air immediately around the burner head; but does have a pronounced effect upon the upflow of the secondary air supply between the peripheries of the plates II and I2 and the lower edge of the boiler skirt 6, enabling the operator so to adjust the burner as to supply. thereto proper proportions of primary and secondary air, thus preventing the burner from fpanting or making a noise during its operation.

The aforesaid burner head 5 to which the invention, as an article of manufacture principally pertains, comprises a hollow shell of an inverted frusto-conical shape, having its upper end closed by a'horizontal top wall I6 and its downwardly converging side wall I! terminating below as a cylindrical, externally screwthreaded nipple I3. Said, burner head 5, at the juncture of the wall I6, which closes the top thereof, with the aforesaid side wall I1. is furnished with a multiplicity of gas outlet passages I9 issuing from' the interior of the burner head adjacent to the periphery of the outer or upper surface of said wall I6. Said passages are so positioned, that, when the burner is in operation they direct a circularlyfan-shaped sheet of flame out around the periphery of said burner head at an upward inclination. Alternating with said air passages I9; the burner head has a series of exterior air supply grooves 20 which are shown 00- cupying about the upper third of the burner wall I1. Each of said grooves widens and deepens toward its upper end and has an inwardly directed upper end portion 20a where the groove joins the upper surface of the top wall It of the burner head, the grooved edge portion of the burner head being beveled in an arcuate manner. Therefore the grooves are positioned to conduct outside air to points within the row of gas outlets provided by said passages I9, so that each outlet is well supplied on all sides with oxygenizing air.

The aforesaid passages I9 open out in vertically extending areas I9a which, before the grooves 29 are machined out, form parts of a truly cylindrical band around the burner head. The inclination and diameter of each of said passages may be varied considerably and its mouth still kept within the area l9a within which the groove opens out. By thus varying said passages the burner head is adapted for use'when supplied with different fuels and in conjunction with different sizes of combustion chambers. The aforesaid top wall 16 of the burner head is castellated or furnished with a set of upstanding lugs 16a grouped around the center of said wall so as to afford a tool-hold whereby the burner head can be conveniently rotated by a suitable tool to screw it onto or unscrew it from a suitable gas supply fixture, for example, the L-fitting 2| of the horizontal gas supply pipe 22 of Fig. 2, where the delivery end portion of said pipe is shown supported subjacent to the aforesaid annular base plate structure by means of a strap iron hanger 23 bolted thereto. For the purpose of igniting the gas issuing from the burner head a pilot 28 is shown.

In Fig. 2 the burner is shown associated with the already mentioned boiler structure 1, this type of boiler having vertical fire tubes 25, the lower ends of which open downwardly through the horizontal boiler head or plate 26 which forms the top wall of the combustion chamber 21. It is to be understood, however, that the burner head 5 may be advantageously installed in many other situations, provided a suitable combustion chamber is afforded thereabove and that such combustion chamber is furnished with the aforementioned flow of primary and secondary air in the proper proportions, to maintain which proportional flow it is necessary that the area of the secondary air intake be adjustable.

In the operation of the burner unoxygenized gas flows from any suitable source of supply into the burner through the supply pipe 22, L 2| and the nipple IS. The gas then issues from the circumferential row of passages l9 through the top of the burner at an upward inclination. This issuing gas is immediately mixed with primary air flowing upwardly between the burner head 5 and the annular member [0. That portion of the air which encounters the conical face of the burner is partially deflected, giving to it additional pressure at its juncture with the issuing gas. Also, part of the primary air which is not deflected by reason of the grooves 20 between the mouths of the jet passages l9 flows upwardly between the emitting jet streams, subsequently to mingle with the issuing gas. As the products of combustion continue in their conical dispersion they contact secondary air flowing into the combustion chamber 21 between the periphery of the base plate structures II and I2 and the lower edge of the skirt 6 (see arrows under the edge of said skirt in Fig. 2). Said 4 secondary air further oxygenizes the combustibles, so as to facilitate complete combustion.

The bolts [2a which support the base plate structure, being vertically adjustable, enable the operator to vary the amount of space between the periphery of the base plate structure and aforesaid skirt 6, so as properly to regulate admission of the secondary air, thus eliminating panting and noise during operation of the burner.

I claim:

1. In combination with a heater having a circumferential wall defining a downwardly opening combustion chamber, means adapted to support said wall with its lower end above a supporting surface, a horizontal annular burner bafile means disposed adjacent and below the lower end of said wall, said bafile means having a central opening, a burner means rising through said central opening adjacent the sides thereof and forming with said central opening a primary annular air feed passage, said baflie means being of a diameter less than the interior diameter of the combustion chamber wall and having its peripheral edge closely adjacent thereto to provide an annular uninterrupted secondary air feed passage between the periphery of the baffle means and the lower end of the chamber wall so that the secondary air is caused to travel upwardly as it is fed into the combustion chamber, the diameter of the central opening relative to the diameter of the bafile means being of the order of at least 1 to 3, and means for adjustably sup porting said bafile means concentrically of the Wall of the combustion chamber whereby in all portions of adjustment the inflow of secondary air will have an upward component.

2. The subject matter of claim 1 wherein the baflie means is supported on adjustable means adapted to stand on said chamber supporting surface for selective adjustment of the baflle relative to the lower end of the combustion chamber wall.

CHARLES W. SIEVERT.

References Cited in the file of this patent UNITED STATES PATENTS Switzerland Feb. 15, 1893 

